📃 December 2014 release notes

New in Firefox for Android

The following features are now available in Firefox for Android:

• Array copyWithin(): The copyWithin() method of arrays and typed arrays shifts or copies items of an array to another index of the array without changing its length.
• font-feature-settings: The font-feature-settings CSS property sets low-level OpenType feature tags for a font. When possible, use font-variant instead.
• font-language-override: The font-language-override CSS property sets which language-specific glyphs are displayed.
• font-synthesis: The font-synthesis CSS shorthand property disables all font synthesis except the given kinds. To disable a specific kind of font synthesis, instead use the longhand properties such as font-synthesis-style and font-synthesis-weight.
• font-variant-alternates: The font-variant-alternates CSS property, along with the @font-feature-values at-rule, chooses when to use a font's alternate glyphs.
• font-variant-caps: The font-variant-caps CSS property sets whether text should be displayed in small caps, petite caps, or with capital letters designed for titles.
• font-variant-east-asian: The font-variant-east-asian CSS property controls glyph substitution and sizing in East Asian text.
• font-variant-ligatures: The font-variant-ligatures CSS property sets how characters can be visually combined for readability or stylistic reasons.
• font-variant-numeric: The font-variant-numeric CSS property sets how numeric characters are displayed. For example, you can align columns of numbers or use zeroes that have a slash.
• String raw(): The String.raw() static method interpolates template literal substitutions, but ignores escape sequences. It is the tag function for template literals.
• WeakSet: A WeakSet object stores unique values of any type without creating strong references to the values, such that membership in the set does not prevent garbage collection of the value.